2289645 has 48 divisors (see below), whose sum is σ = 4363632. Its totient is φ = 1105920.

The previous prime is 2289643. The next prime is 2289647. The reversal of 2289645 is 5469822.

It is a happy number.

2289645 is a `hidden beast` number, since 2 + 2 + 8 + 9 + 645 = 666.

It is an interprime number because it is at equal distance from previous prime (2289643) and next prime (2289647).

It can be written as a sum of positive squares in 8 ways, for example, as 66564 + 2223081 = 258^2 + 1491^2 .

It is not a de Polignac number, because 2289645 - 2¹ = 2289643 is a prime.

It is a super-3 number, since 3×2289645³ = 36010214697741033375, which contains 333 as substring.

2289645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2289641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31329 + ... + 31401.

It is an arithmetic number, because the mean of its divisors is an integer number (90909).

2^2289645 is an apocalyptic number.

It is an amenable number.

2289645 is a deficient number, since it is larger than the sum of its proper divisors (2073987).

2289645 is a wasteful number, since it uses less digits than its factorization.

2289645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 139 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 2289645 is about 1513.1572951944. The cubic root of 2289645 is about 131.8022175745.

The spelling of 2289645 in words is "two million, two hundred eighty-nine thousand, six hundred forty-five".